Iron powder burner and combustor

Abstract

The application belongs to the technical field of iron powder burners, and particularly discloses an iron powder burner and a burner, which comprise: a first pipe body, which is provided with a first nozzle; the first nozzle is used for spraying iron powder in a preset particle size range along a preset direction; a second pipe body is at least partially inserted into the first pipe body, and a first cavity for conveying iron powder is formed between the second pipe body and the first pipe body; the second pipe body is provided with a second nozzle for driving iron powder by spraying a first gas, and the second nozzle is in communication with the first cavity and the first nozzle respectively; a third pipe body is provided with at least one third nozzle, and the third nozzle is used for spraying a second gas; the third nozzle is circumferentially arranged at the periphery of the first nozzle; and a plasma generator is used for forming a temperature environment for iron powder combustion; the iron powder burner has the advantages that stable and controllable spraying and sufficient combustion of iron powder are realized, harmful gas emission is reduced, and the combustion efficiency and stability are improved.

Description

Technical Field

[0001] This invention relates to the field of iron powder burner technology, and more specifically, to an iron powder burner nozzle and burner. Background Technology

[0002] Traditional combustion technology is widely used in energy production, industrial heating, and transportation, especially in the combustion of fossil fuels such as coal and natural gas, where the burner is a core component. However, during operation, particularly in the combustion of coal or natural gas, burners typically emit large amounts of harmful gases such as carbon dioxide, nitrogen oxides, and sulfides. These harmful gases not only cause serious air pollution but also exacerbate the greenhouse effect and acid rain.

[0003] Therefore, an iron powder burner and burner are proposed to solve the problems mentioned above. Summary of the Invention

[0004] The present invention aims to provide an iron powder burner and burner to solve or improve the safety hazards caused by insufficient mixing of iron powder and oxygen, insufficient flow control accuracy, and improper temperature control during high-temperature combustion in the above-mentioned technical problems.

[0005] In view of this, a first aspect of the present invention is to provide an iron powder burner.

[0006] A second aspect of the present invention is to provide a burner.

[0007] A first aspect of the present invention provides an iron powder burner, comprising: a first tube having a first nozzle; the first nozzle being used to spray iron powder within a preset particle size range along a preset direction; a second tube at least partially inserted inside the first tube, wherein a first cavity for conveying iron powder is formed between the second tube and the first tube; a second nozzle formed on the second tube by spraying a first gas to drive the iron powder, the second nozzle being connected to the first cavity and the first nozzle respectively; a third tube having at least one third nozzle, the third nozzle being used to spray a second gas along the preset direction; the third nozzle being arranged circumferentially around the first nozzle so that the sprayed second gas contacts the sprayed iron powder along the preset direction; and a plasma generator for creating a temperature environment for iron powder combustion.

[0008] A second aspect of the present invention provides a burner comprising a burner housing and an iron powder burner as described in any of the above technical solutions; the burner housing is filled with refractory material, and the first tube and the third tube respectively penetrate the burner housing.

[0009] The beneficial effects of this invention compared to the prior art are as follows: By using iron powder as fuel and spraying iron powder within a preset particle size range from the first nozzle of the first tube in a preset direction, and combining it with the first cavity formed by the second tube for conveying iron powder and the second nozzle on it that drives the iron powder by spraying the first gas, the iron powder has a clear and controllable direction of movement and a stable and continuous supply state during the process of being induced, carried and sprayed out. The second gas is emitted from a third nozzle arranged circumferentially on the third tube body and sprayed in the same direction as the first nozzle. This causes the second gas to surround and envelop the iron powder jet ejected from the first nozzle in space, thereby forming a concentrated contact area between the iron powder and the second gas in a preset direction near the burner outlet, enhancing the mixing and reaction conditions between the two. In addition, a plasma generator set outside the above structure forms a temperature environment for the iron powder to burn, so that the iron powder can be ignited in a reliable high-temperature field and maintain stable combustion after being ejected.

[0010] Therefore, while replacing carbon-containing fuels such as coal and natural gas with iron powder to avoid the emission of the aforementioned harmful gases, the combination structure of three coaxial tube arrangement and plasma ignition improves the ignition reliability and combustion stability of iron powder combustion, improves the mixing uniformity of iron powder and gas and the degree of combustion, and enables iron powder to achieve the overall technical effect of controllable injection, controllable supply and controllable combustion when used as a clean fuel in engineering applications.

[0011] Additional aspects and advantages of embodiments of the invention will become apparent in the following description or may be learned by practice of embodiments of the invention. Attached Figure Description

[0012] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the working state of the present invention.

[0013] in, Figures 1-3 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1 Refractory material, 2 Plasma generator, 3 Flame detection device, 4 Compressed gas ejector tube, 5 Gas orifice plate flow meter, 6 Microwave powder flow meter, 7 Iron powder through pipe, 8 Gas input pipe, 9 Vortex flow meter, 10 Burner shell, 11 Gas ring pipe, 12 First nozzle, 13 Iron powder combustion flame, 14 Third nozzle, 15 Second nozzle, 16 Delivery pipe. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0015] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0016] Please see Figures 1-3 The following describes an iron powder burner and burner according to some embodiments of the present invention.

[0017] An embodiment of the first aspect of the present invention provides an iron powder burner. In some embodiments of the present invention, such as... Figures 1-3 As shown, the iron powder burner includes: A first tube body has a first nozzle 12; the first nozzle 12 is used to spray iron powder within a preset particle size range along a preset direction; the preset direction is located in the direction in which the iron powder is expected to move and burn.

[0018] The second tube is at least partially inserted inside the first tube. A first cavity for conveying iron powder is formed between the outer wall of the second tube and the inner wall of the first tube. The first cavity is annular. A second nozzle 15 is formed on the second tube, which drives the iron powder by spraying a first gas. The second nozzle 15 is connected to the first cavity and the first nozzle 12 respectively. The second nozzle 15 drives the iron powder by spraying the first gas, so that the iron powder is continuously sprayed out and burned.

[0019] The third tube has at least one third nozzle 14 for injecting a second gas in a preset direction. The third nozzle 14 is arranged circumferentially around the first nozzle 12 so that the injected second gas contacts the injected iron powder in the preset direction. The second gas can be a gas that can react with the iron powder at high temperature and release heat.

[0020] Plasma generator 2 is used to create a temperature environment for the combustion of iron powder, so as to ignite the iron powder to react with the first gas and / or the second gas and release heat.

[0021] This invention provides an iron powder burner, in which a first tube body is used to guide and spray iron powder into the combustion zone. The first tube body is provided with a first nozzle 12, which sprays iron powder along a predetermined direction. The predetermined direction refers to the direction along which the iron powder is expected to travel during combustion, ensuring that the iron powder can be accurately sprayed into the combustion zone and react smoothly with gases such as oxygen for complete combustion. The particle size range of the iron powder needs to take into account its specific surface area to ensure a complete combustion reaction.

[0022] The second tube is inserted inside the first tube, forming an annular first cavity for conveying iron powder. This annular first cavity effectively prevents iron powder blockage or uneven distribution, ensuring stable flow during injection. A second nozzle 15 is provided on the second tube for injecting a first gas, such as air or nitrogen. Injecting this first gas propels the iron powder outwards. The first gas not only powers the iron powder but also enters the combustion zone with it, forming a combustion-inducing mixture. During injection, the first gas continuously pushes the iron powder towards the combustion zone through the second nozzle 15, promoting thorough mixing with oxygen or other reactive gases and initiating combustion. The second nozzle 15 ensures the stability of the iron powder injection, allowing it to be continuously injected into the combustion zone and react with the second gas. In this way, the iron powder achieves complete combustion at high temperatures, releasing the necessary heat.

[0023] The third tube in the iron powder burner serves to assist combustion. It is equipped with a third nozzle 14, which injects a second gas—specifically, a gas capable of reacting with the iron powder at high temperatures and releasing heat, such as oxygen or other highly reactive gases. The third nozzle 14 is circumferentially positioned around the first nozzle 12, ensuring that the injected second gas contacts the injected iron powder along a predetermined direction. The injection of the second gas not only provides the iron powder with necessary oxygen or other reactive gases, enhancing heat release during combustion, but also allows for further control of combustion temperature and speed by adjusting the gas flow rate, ensuring complete combustion of the iron powder and improving reaction efficiency. The circumferential arrangement of the third nozzle 14 ensures that the gas evenly covers the iron powder injection area, enhancing the contact and reaction efficiency between the gas and the iron powder, thereby improving the comprehensiveness and stability of combustion.

[0024] Plasma generator 2 is used in the iron powder burner to provide a high-temperature environment, ensuring that the iron powder reaches a sufficient temperature to ignite its reaction with the first and / or second gases. Plasma generator 2 can generate high-temperature plasma, with temperatures reaching 5000K to 10000K, using electrical energy or other energy sources, sufficient to initiate the reaction between the iron powder and the gases.

[0025] In summary, the iron powder burner of the present invention, through a first tube, a second tube, and a third tube, combined with gas injection mixing, achieves stable injection and efficient combustion of iron powder. The first nozzle 12 on the first tube opens the iron powder along a predetermined direction, ensuring it enters the combustion zone along the desired trajectory. The second tube injects a first gas, continuously propelling the iron powder outwards and fully mixing it with the gas to promote combustion. The third nozzle 14 of the third tube is arranged circumferentially, injecting a second gas to enhance the contact between the iron powder and the gas, further optimizing the combustion process. Furthermore, the plasma generator 2 provides a high-temperature environment, triggering a reaction between the iron powder and the gas and releasing heat, achieving stable and efficient combustion. The overall solution optimizes combustion efficiency and reduces pollutant emissions.

[0026] Specifically, the preset direction is as follows: Figure 3 As shown, an iron powder combustion flame 13 is formed in the combustion zone in the right single-axis direction.

[0027] In any of the above embodiments, the iron powder burner further includes a first monitoring point and a second monitoring point; Multiple monitoring points are set up, and they are respectively located inside the first pipe body, the second pipe body, and the third pipe body.

[0028] The second monitoring point is located between the first nozzle 12 and the third nozzle 14.

[0029] The first monitoring point works in conjunction with the second monitoring point to adjust the combustion state of the iron powder with the first gas and / or the second gas.

[0030] In this embodiment, multiple first monitoring points are set, respectively located inside the first, second, and third tubes. These first monitoring points monitor parameters such as the delivery volume, flow rate, and pressure of iron powder, the first gas, and the second gas. During combustion, these first monitoring points collect this data in real time, providing a basis for subsequent adjustments and control. Specifically, the placement of the first monitoring points at three different locations allows for monitoring changes in iron powder, gas flow rate, and combustion state. The monitoring point in the first tube primarily monitors the iron powder flow rate and injection state. By monitoring the iron powder delivery volume, a stable and uniform iron powder supply can be ensured, preventing incomplete combustion or excessively low temperatures due to uneven delivery. The monitoring point in the second tube focuses on monitoring the first gas flow rate and pressure. By adjusting the first gas flow rate, the injection speed of the iron powder can be controlled, ensuring that the iron powder enters the combustion zone at an appropriate speed, avoiding combustion instability caused by excessively fast or slow injection. The monitoring point in the third tube monitors the second gas flow rate, ensuring that the oxygen supply meets the combustion requirements, preventing insufficient or excessive oxygen supply from affecting the combustion effect.

[0031] The second monitoring point is located between the first nozzle 12 and the third nozzle 14. Its function is to monitor the flame state in the combustion zone, acquiring information such as flame temperature and brightness as parameters for judging the combustion state. The second monitoring point is located after the iron powder and gas mix, just before entering the combustion stage. By monitoring the flame state, the reaction situation during combustion can be understood in real time. The second monitoring point monitors the stability and combustion intensity of the flame, providing data such as flame temperature, flame length, and stability in the combustion zone to help determine whether combustion has reached the predetermined temperature and efficiency. If the flame temperature is detected to be too low or unstable, the gas flow rate, iron powder supply, or other adjustment mechanisms can be adjusted to ensure stable combustion. Furthermore, the coordination between the second and first monitoring points allows for adjustments to the gas flow rate, iron powder supply, and injection angle based on the monitored flame state. This collaborative work ensures that the iron powder and gas maintain optimal reaction conditions during combustion, avoiding excessive energy waste or incomplete combustion.

[0032] Specifically, the second monitoring point is the flame detection device 3, which may include an infrared flame detector and a visible light flame detector, and can monitor the state of the flame in real time, including parameters such as the flame's temperature, stability, and brightness.

[0033] In any of the above embodiments, the first gas includes air, and the second gas includes oxygen; Multiple primary monitoring points are used to obtain the amount of iron powder, oxygen, and air transported per unit time.

[0034] In this embodiment, the first gas is air. Air's main role in the combustion process is as a gas transport medium, guiding the iron powder from the burner to the combustion zone. Air, a common gas, contains approximately 21% oxygen, providing some oxygen for combustion. By injecting air, the iron powder is continuously ejected outwards in a preset direction, smoothly entering the combustion zone and mixing thoroughly with oxygen and other gases to complete the combustion reaction. The role of air is not only to transport the iron powder but also to provide initial airflow support for the entire combustion process. The first monitoring point monitors the air flow rate and pressure in real time to ensure the stability of the air supply, preventing uneven iron powder injection or incomplete combustion due to excessive or insufficient air flow.

[0035] The second gas is oxygen, which plays a crucial role in providing the oxygen needed for the oxidation reaction during combustion. Compared to oxygen in the air, pure oxygen provides a higher concentration, thereby improving combustion efficiency. Injecting oxygen accelerates the combustion process of the iron powder, ensuring it receives sufficient oxygen to further enhance calorific value release and reaction rate.

[0036] The first monitoring point is deployed in multiple locations within different pipes, enabling separate monitoring of the delivery of iron powder, oxygen, and air, thus providing data for adjusting the combustion state. By monitoring changes in gas and iron powder flow rates, the gas flow rate, iron powder delivery volume, and injection parameters can be automatically adjusted as needed to ensure the combustion process remains at its optimal state.

[0037] Specifically, the theoretical reaction formula for the combustion of iron powder is: 3Fe(s)+2O2(g)→Fe3O4(s)+3354.96kJ One gram of metallic iron releases 19.97 kJ of heat when burned in oxygen.

[0038] Furthermore, by adjusting the iron-oxygen ratio, the mass ratio of iron powder to oxygen for complete combustion is 26.25:1, thereby improving the combustion thermal efficiency.

[0039] In any of the above embodiments, the preset particle size range is 400 mesh to 600 mesh, and the second monitoring point is used to obtain flame detection values; The particle size of the iron powder selected within a preset particle size range is correlated with the flame detection value, so as to adjust the particle size of the iron powder through the flame detection value and ensure that the flame detection value is within the expected range.

[0040] In this embodiment, the preset particle size range is 400 to 600 mesh, and the particle size within this range is related to the combustion process of the iron powder. The choice of particle size directly affects the reaction rate, combustion efficiency, and final heat release of the iron powder. When the iron powder particle size is small, it has a larger specific surface area, resulting in a larger contact area with the gas and enabling rapid oxidation. Iron powder of this particle size can rapidly release heat during combustion, thereby increasing the combustion temperature and accelerating the reaction. However, if the particle size is too small, the iron powder may be too dispersed in the burner, increasing airflow resistance and affecting the uniform delivery and spraying effect of the iron powder. On the other hand, if the particle size is too large, the combustion reaction rate of the iron powder will slow down, failing to provide the required heat in time, and may lead to reduced combustion efficiency due to incomplete reaction. Therefore, selecting a particle size range of 400 to 600 mesh ensures the reaction rate while avoiding excessive airflow resistance and ensuring that the iron powder can react efficiently and stably during combustion.

[0041] To ensure the combustion process remains optimal, flame detection values ​​can serve as feedback signals to dynamically adjust the particle size of the iron powder. When a flame detection value deviates from the expected range, the particle size of the iron powder can be automatically adjusted to restore flame stability and temperature.

[0042] When the flame detection value is below the preset range, it indicates that the temperature during combustion is insufficient, which is due to the iron powder particles being too large, resulting in a slow reaction rate. In this case, selecting smaller iron powder particles increases the specific surface area, improves the reaction rate, and thus increases the flame temperature, ensuring that the combustion process achieves the expected high-temperature effect.

[0043] If the flame detection value is too high, it indicates that the iron powder particle size is too small, causing the reaction to be too violent and the flame temperature to be too high. In this case, adjust the iron powder particle size, selecting larger particles to slow down the reaction rate, avoid excessive combustion and heat waste, and thus restore the flame temperature to the ideal range.

[0044] Specifically, the preset particle size range of the iron powder is 400 to 600 mesh. The second monitoring point is used to acquire flame detection values, forming a set of mutually constraining parameters in terms of structure and function. On the one hand, by limiting the iron powder to a particle size range of 400 to 600 mesh, the combustion rate, flame morphology, and flame stability of the iron powder during ejection and combustion all fall within a predictable range. This allows the flame detection values ​​to exhibit a regular response characteristic that varies with particle size within the particle size range. On the other hand, the flame detection values ​​acquired by the second monitoring point are not merely simple result records, but rather a characterizing quantity reflecting whether the current combustion state meets the desired operating conditions. This is used to infer whether the iron powder particle size is within an appropriate range, thereby establishing a correspondence between particle size, combustion behavior, and flame detection values.

[0045] Based on the aforementioned correspondence, by linking the selected particle size of iron powder within a preset particle size range with the flame detection value, the iron powder particle size is no longer a passive parameter that is fixed for a single time, but rather an adjustable parameter that can be adjusted in conjunction with the flame detection value. When the flame detection value obtained from the second monitoring point deviates from the expected range, it can be determined that there is a difference between the combustion state under the currently selected particle size and the target working condition. Therefore, the iron powder particle size can be reselected or adjusted within the range of 400 mesh to 600 mesh. By changing the influence of particle size on the combustion process, the flame detection value can be guided back to the expected range. This achieves a particle size adjustment mechanism based on flame detection value feedback, forming a closed-loop correlation between the iron powder particle size setting and the actual combustion effect. This facilitates more precise matching and optimization of the combustion state without exceeding the preset particle size range.

[0046] Specifically, under the above parameters, the following effects are achieved: iron powder particle size of 400 mesh, 500 mesh, and 600 mesh; ignition temperature of 400–600℃; and normal combustion flame of 500–1000 mm.

[0047] In any of the above embodiments, the plasma generator 2 has an excitation end; and Along the preset direction, the excitation end is located between the first nozzle 12 and the second monitoring point; Along a direction perpendicular to the preset direction, the excitation end is located between the first nozzle 12 and the third nozzle 14.

[0048] In this embodiment, the plasma generated by the plasma generator 2 provides the necessary high-temperature environment for the iron powder, promoting a full reaction between the iron powder and the gas. In the structure of the plasma generator 2, the positioning of the excitation end determines the plasma generation location and its contact effect with the iron powder and gas. The excitation end is responsible for generating plasma and delivering it to the combustion zone in the plasma generator 2. The plasma has extremely high temperatures, reaching 5000K to 10000K, which can rapidly heat the iron powder to its ignition temperature and initiate the oxidation reaction between the iron powder and oxygen or other gases. The position of the excitation end affects the stability of the plasma, its generation efficiency, and the distribution of the high-temperature region, thus affecting the overall combustion process.

[0049] Along a predetermined direction, the excitation end is positioned between the first nozzle 12 and the second monitoring point, ensuring that the plasma provides just the right amount of heating support during the injection of iron powder and gas. Since the first nozzle 12 is used to inject iron powder, and the second monitoring point is responsible for real-time monitoring of the flame state and temperature, the positioning of the excitation end allows for rapid heating of the iron powder during injection, bringing it to the temperature required for combustion, and providing continuous heat support through the plasma. The plasma generated at this position directly affects the temperature distribution of the iron powder and gas entering the combustion zone. By placing the excitation end between the first nozzle 12 and the second monitoring point, the plasma can fully contact the gas during iron powder injection, ensuring that the iron powder is rapidly heated to the required combustion temperature and avoiding incomplete combustion due to excessively low temperatures.

[0050] The excitation end is located between the first nozzle 12 and the third nozzle 14 in a direction perpendicular to the preset direction, ensuring that the plasma can work synergistically between the iron powder injection and the second gas injection. The third nozzle 14 is used to inject the second gas, which provides additional oxygen to promote the oxidation reaction during combustion. Arranging the excitation end between the first nozzle 12 and the third nozzle 14 ensures that the heat of the plasma can effectively act on the injected iron powder and gas mixture, promoting the rapid occurrence of the oxidation reaction.

[0051] By positioning the excitation end of the plasma generator 2 between the first nozzle 12 and the second monitoring point, and between the first nozzle 12 and the third nozzle 14, the high-temperature output of the plasma is ensured to effectively support the rapid heating of the iron powder and the full reaction of the gas. The position of the excitation end ensures sufficient contact between the iron powder and the gas, improving the stability and efficiency of the combustion process, while reducing the problems of incomplete combustion caused by uneven reaction or excessively low temperature.

[0052] In any of the above embodiments, the third tube includes: Gas inlet pipe 8, the first monitoring point includes a vortex flow meter 9 installed on gas inlet pipe 8; The gas ring pipe 11 is sleeved on the outside of the first pipe body; the gas ring pipe 11 is connected to the gas input pipe 8 and all the third nozzles 14 respectively.

[0053] In this embodiment, the third tube includes a gas input pipe 8 and a gas ring pipe 11. The gas input pipe 8 is used to introduce the gas for injection into the third tube. The first monitoring point includes a vortex flow meter 9 installed on the gas input pipe 8. By installing the vortex flow meter 9 on the gas input pipe 8, the flow rate of the gas entering the third tube can be acquired and monitored before it enters the gas ring pipe 11 and each of the third nozzles 14. The real-time measurement of the gas flow rate in the gas input pipe 8 by the vortex flow meter 9 can provide basic data for subsequent adjustments based on the gas flow rate in conjunction with the iron powder flow rate and flame detection. This ensures that the gas entering the third tube is not simply supplied under fixed operating conditions, but has measurable quantitative characteristics from the introduction stage, which is beneficial for ensuring that the supply of the second gas is within the expected range during the operation of the iron powder burner.

[0054] A gas ring pipe 11 is fitted around the outside of the first pipe body. The gas ring pipe 11 is connected to the gas input pipe 8 and all the third nozzles 14. The annular arrangement allows the gas introduced by the gas input pipe 8 and monitored by the vortex flow meter 9 to form a circumferential distribution channel within the gas ring pipe 11, and then be ejected through each of the third nozzles 14. The connection between the gas ring pipe 11 and all the third nozzles 14 allows the gas entering the third pipe body to be distributed to each of the third nozzles 14 during its circumferential flow. This facilitates the formation of a circumferentially distributed gas jet field around the first nozzle 12, making the second gas ejected from the third nozzles 14 more spatially uniform. This helps to form stable and uniform contact conditions with the iron powder ejected from the first nozzle 12 in a predetermined direction, improving the sufficiency of contact and the consistency of combustion between the iron powder and the second gas in the combustion zone.

[0055] In any of the above embodiments, the first tube includes: The iron powder passage pipe 7 extends in a direction perpendicular to the preset direction, which is conducive to the loading and introduction of iron powder; the first monitoring point also includes a microwave powder flow meter 6 installed on the iron powder passage pipe 7. The conveying pipe 16 extends along a preset direction, which facilitates the movement of iron powder in the preset direction; the conveying pipe 16 is connected to the iron powder passage pipe 7.

[0056] In this embodiment, the first tube body includes two parts: an iron powder passage pipe 7 and a conveying pipe 16. The iron powder passage pipe 7 extends perpendicular to a preset direction, which facilitates the loading and introduction of iron powder, and makes it easy to stably deliver externally supplied iron powder into the first tube body. By setting the iron powder passage pipe 7 to be arranged vertically, a clear loading path can be formed during the process of iron powder entering the burner from the outside, so that the iron powder can enter the conveying pipe 16 in an orderly manner through a predetermined channel, thereby creating the preconditions for subsequent conveying along the preset direction. The first monitoring point also includes a microwave powder flow meter 6 installed on the iron powder passage pipe 7. The cooperative arrangement of the microwave powder flow meter 6 and the iron powder passage pipe 7 allows the conveying status information of iron powder in the iron powder passage pipe 7 to be obtained during the process of loading and introducing iron powder into the first tube body. Thus, the flow of iron powder can be monitored while it is still in the introduction stage, improving the observability and traceability of the iron powder loading and introduction process.

[0057] The conveying pipe 16 extends along a preset direction, facilitating the movement of iron powder in that direction. The conveying pipe 16 is connected to the iron powder passage pipe 7, allowing the iron powder loaded and introduced through the iron powder passage pipe 7 to directly transition into the conveying pipe 16 extending along the preset direction for continued movement. Through this structural arrangement of vertical loading and introduction followed by conveying along the preset direction, the first pipe body spatially distinguishes and connects the iron powder loading path and the iron powder movement path. On one hand, the iron powder passage pipe 7 completes the orderly introduction of iron powder from the outside into the first pipe body; on the other hand, the conveying pipe 16 ensures the directional conveying of iron powder along the preset direction. This provides a clear and continuous flow path for the entire conveying process from entering the burner to being sprayed, which helps maintain the consistency of the iron powder's movement direction and the stability of the conveying process.

[0058] In any of the above embodiments, the second tube includes: The compressed gas ejector tube 4 penetrates the side wall of the first tube body and extends into the interior of the delivery tube 16; the first monitoring point also includes a gas orifice plate flow meter 5 installed on the compressed gas ejector tube 4.

[0059] In this embodiment, the second tube includes a compressed gas ejector 4, which penetrates the side wall of the first tube and extends into the interior of the conveying pipe 16. This allows compressed gas to be introduced into the second tube and directly act on the iron powder flow within the conveying pipe 16. By arranging the compressed gas ejector 4 through the side wall of the first tube and extending its tip into the interior of the conveying pipe 16, a gas jet along a preset direction can be formed within the conveying pipe 16. This allows the compressed gas to form a superimposed flow state with the iron powder within the conveying pipe 16, structurally ensuring that the compressed gas can effectively influence the iron powder in the conveying path. This facilitates the ejection, carrying, or pushing effect on the iron powder within the conveying pipe 16, thereby guiding the iron powder to move stably along the preset direction in conjunction with the extension direction of the conveying pipe 16.

[0060] The first monitoring point also includes a gas orifice plate flow meter 5 installed on the compressed gas ejector tube 4. The combination of the gas orifice plate flow meter 5 and the compressed gas ejector tube 4 allows the flow rate of the compressed gas introduced through the compressed gas ejector tube 4 to be acquired in real time before entering the delivery pipe 16. By installing the gas orifice plate flow meter 5 on the compressed gas ejector tube 4, the volumetric flow rate or mass flow rate of the compressed gas can be monitored during the delivery of the compressed gas along the ejector tube. This provides quantifiable flow parameters for the compressed gas ejection process at the structural level, making the introduction of compressed gas no longer a passive process that simply depends on fixed operating conditions, but rather a process with monitorable and adjustable basic conditions. This is beneficial for achieving precise control of the compressed gas ejection intensity and ejection state at the second pipe body, and further meets the movement requirements of iron powder in the delivery pipe 16.

[0061] A second aspect of the invention provides a burner. In some embodiments of the invention, such as... Figures 1-3 As shown, the burner has a burner housing 10 and an iron powder burner as described in any of the above embodiments; The burner shell 10 is filled with refractory material 1, and the first tube and the third tube respectively penetrate the burner shell 10.

[0062] This invention provides a burner comprising a burner housing 10 and an iron powder burner as described in any of the above embodiments. The burner housing 10 is internally filled with refractory material 1, and a first tube and a third tube penetrate the burner housing 10. The iron powder burner is no longer an isolated component but is installed and confined within the overall combustion structure formed by the burner housing 10. The refractory material 1 inside the burner housing 10 spatially covers and surrounds the first and third tubes, ensuring that they remain surrounded and supported by the refractory material 1 throughout their penetration of the burner housing 10. This facilitates the formation of a relatively stable and clearly defined combustion zone within the burner. The first tube performs the iron powder injection function, and the third tube performs the second gas injection function. Both tubes open towards the same side end after penetrating the burner housing 10. Through the internal space confined by the refractory material 1, the injection and reaction of iron powder and gas are controlled within the area enclosed by the burner housing 10, preventing the combustion process from adversely affecting the exterior of the burner housing 10.

[0063] The burner shell 10 is filled with refractory material 1, so that the heat generated by high-temperature combustion during burner operation is first absorbed and buffered by the refractory material 1. The first and third tubes, while penetrating the burner shell 10, are embedded in this refractory layer. On the one hand, this helps to form a protective layer with a certain heat capacity and high-temperature resistance on its outer periphery; on the other hand, it also structurally defines the spatial relationship between the first and third tubes, ensuring their stable relative arrangement within the burner shell 10. Since the first tube is used to inject iron powder and the third tube is used to inject the second gas, both need to form corresponding nozzle planes on one end face of the burner shell 10. Through the filling of refractory material 1, a relatively flat end face structure that can withstand high-temperature environments can be formed near this end face. This prevents the first nozzle 12 and the third nozzle 14 from damaging the shell structure due to local high temperature or thermal erosion when they operate in the same end face area, thus helping to ensure the structural stability and reliability of the burner during long-term operation.

[0064] In summary, the burner of this invention effectively combines the iron powder burner, the burner shell 10, and the refractory material 1. The first and third tubes penetrate the burner shell 10 while being covered and supported on the outside by the refractory material 1, forming a combustion structure where the transport and injection of iron powder and gas, as well as the combustion reaction, are all confined within the internal space of the burner shell 10. In this way, the high-temperature flame formed by the iron powder moving in a predetermined direction and contacting and reacting with the second gas is confined within the burner shell 10 and near its outlet. This creates a clear separation between the high-temperature area generated by combustion and the external environment. It facilitates the organic integration of the injection and monitoring functions of each tube in the iron powder burner with the burner's high-temperature load-bearing capacity and spatial constraint capabilities at the structural level, forming a unified combustion unit with clearly defined structural boundaries and easily controllable combustion conditions.

[0065] In any of the above embodiments, the first nozzle 12 and the third nozzle 14 are located on one side end face of the burner housing 10.

[0066] In this embodiment, the first nozzle 12 and the third nozzle 14 are located on one side end face of the burner housing 10, so that the iron powder injection direction and the second gas injection direction are spatially converged in the same end face area, forming a combustion surface with consistent orientation, concentrated outlet, and clear boundary. By uniformly arranging the first nozzle 12 and the third nozzle 14 on the same side end face of the burner housing 10, when the iron powder is ejected from the first nozzle 12 in a preset direction, it can directly encounter the second gas ejected from each of the third nozzles 14 in the area near the end face of the housing. This avoids the iron powder injection path and the second gas injection path being spatially misaligned or dispersed, which is conducive to forming a concentrated contact area between the iron powder and the second gas on the outer side of the end face of the housing, adjacent to the end face, thereby improving the sufficiency of contact between the two in the initial stage of ejection and the concentration of the combustion reaction.

[0067] The arrangement of the first nozzle 12 and the third nozzle 14 on the same side end face also gives the burner shell 10 a single-sided concentrated flame outlet end face structure, which facilitates the use of this end face as the interface between the burner and the subsequent furnace or heated space. With this arrangement, after the first and third tubes penetrate the burner shell 10, their nozzles all fall on the same end face plane. This facilitates overall sealing and fixing at this end face, and also allows for overall adjustment of the flame outlet direction of the first nozzle 12 and the third nozzle 14 by adjusting the posture of the burner shell 10 during installation. Thus, without changing the internal tube structure, the installation adjustment of the single end face allows for unified alignment and coordinated control of the iron powder injection direction and the second gas injection direction, resulting in a relatively concentrated combustion area with clear boundaries, which is more conducive to controlling the flame position and flame shape.

[0068] Specifically, such as Figure 3 As shown, the iron powder combustion flame 13 is located in the right side region of one end face of the burner housing 10.

[0069] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0070] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An iron powder burner, characterized in that, include: A first tube body having a first nozzle; The first nozzle is used to spray iron powder within a preset particle size range along a preset direction; The second tube is at least partially inserted inside the first tube, and a first cavity for conveying iron powder is formed between the second tube and the first tube; a second nozzle is formed on the second tube to drive the iron powder by spraying a first gas, and the second nozzle is connected to the first cavity and the first nozzle respectively. The third tube has at least one third nozzle for injecting a second gas along the preset direction; the third nozzle is arranged circumferentially around the first nozzle so that the injected second gas contacts the injected iron powder along the preset direction. A plasma generator is used to create a temperature environment for the combustion of iron powder.

2. The iron powder burner according to claim 1, characterized in that, It also includes a first monitoring point and a second monitoring point; Multiple first monitoring points are set up, and they are respectively set inside the first pipe body, the second pipe body and the third pipe body; The second monitoring point is located between the first nozzle and the third nozzle; The first monitoring point works in conjunction with the second monitoring point to adjust the combustion state of the iron powder with the first gas and / or the second gas.

3. The iron powder burner according to claim 2, characterized in that, The first gas includes air, and the second gas includes oxygen; Multiple of the first monitoring points are used to obtain the amount of iron powder, oxygen, and air transported per unit time.

4. The iron powder burner according to claim 2, characterized in that, The preset particle size range is 400 mesh to 600 mesh, and the second monitoring point is used to obtain flame detection values; The particle size of the iron powder selected within the preset particle size range is associated with the flame detection value.

5. The iron powder burner according to claim 2, characterized in that, The plasma generator has an excitation end; and Along the preset direction, the excitation end is located between the first nozzle and the second monitoring point; Along a direction perpendicular to the preset direction, the excitation end is located between the first nozzle and the third nozzle.

6. The iron powder burner according to any one of claims 2-5, characterized in that, The third tube includes: Gas inlet pipe, the first monitoring point includes a vortex flow meter installed on the gas inlet pipe; A gas ring pipe is sleeved on the outside of the first pipe body; the gas ring pipe is connected to the gas input pipe and all the third nozzles respectively.

7. The iron powder burner according to claim 6, characterized in that, The first tube body includes: The iron powder passage extends along a direction perpendicular to the preset direction; the first monitoring point also includes a microwave powder flow meter installed on the iron powder passage. The conveying pipe extends along the preset direction; the conveying pipe is connected to the iron powder passage pipe.

8. The iron powder burner according to claim 7, characterized in that, The second tube body includes: A compressed gas ejector tube penetrates the side wall of the first tube body and extends into the interior of the delivery tube; the first monitoring point also includes a gas orifice plate flow meter disposed on the compressed gas ejector tube.

9. A burner, characterized in that, Includes a burner housing and an iron powder burner as described in any one of claims 1-8; The burner shell is filled with refractory material, and the first tube and the third tube respectively penetrate the burner shell.

10. The burner according to claim 9, characterized in that, The first nozzle and the third nozzle are located on one end face of the burner housing.

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